As the leading supplier of firearm magazines, you can count on The Mag Shack to carry the best 45 ACP magazine selection online. Featuring products from top brands such as GLOCK, REDBALL Sports and ProMag, each 45 magazine in our inventory is made for excellent, long-lasting performance. If you’re on a budget, you’ll be able to find an extraordinary 45 ACP magazine at a great price that won’t break the bank. However, we also sell more high-end magazines for dedicated gun enthusiasts. When you’re ready to upgrade or add a new 45 magazine to your collection, check out our products below and order today.